Electric heating apparatus for metal-working machines



F. P. ROBERT.

ELECTRIC HEATING APPARATUS TOR NIETAI. WORKING MACHINES. APPLICAUON FILED APR..5 1911. RENEWED AUG. e. |919.

1,333,080. Patented Mar. 9, 1920.

2 SHEETS-*SHEET- 1.

Il ll Il l F. P. KOBERT.

ELECTRIC HEATING APPARATUS FOR METAL WORKING MACHINES.

APPLICATION FILED APR.5.1911. RENEwED Aue. 8, 1919.

1,333,080. Patented Ma.. 9,19%,

2 SHEETS-SHEET 2.

UNITED sraans Ararnm orricn.

FRANK P. KOBERT, OF AMITYVILLE, NEW YORK.

ELECTRIC HEATING APPARATUS FOB, METAL-WORKING MACHINES.

Specification of Letters Patent.

Patented Mar. e, .1.920.

` Application led April 5, 1917, Serial No. 1'59,852.. Renewed-August 8, 1919. Seriall No. 316,205.

To all whomv t may concern.'

Be it known that I, FRANK P. KoBERT, a citizen of the United States, and residing at Amit wille, L. I., in the county of Suffolk and tate of New York, have invented certain new and useful Improvements in Electric Heating Apparatus for Metal-VVorking Machines, of which the following is a specification, such as will enable those skilled in the art to which it. appertains to make Aand use the. same.

This invention relates to electric heating apparatus for metal working machines such as forging machines, electric riveting machines, electric welding machines and other apparatus of this class, and the object of.

vufacture, and the machine being what is known in the art as a heading, rehead1ng,

upsetting and forging machine, and the electric heating apparatus forming the basis of this application is taken from the said prior application and involves the electric heating apparatus shown and described in said prior application and .certain improvements that have beenV added thereto;

The invention forming the basis of this application is fully disclosed in the following specification, of which the accompanying drawings form a part, in which the separate parts of my improvement are desi nated by suitable reference 'characters 1n each of the views, and in which Figure lis a diagrammatic and sectional side View of my improved electric heating apparatus Fig. 2 a` plan and sectional view thereof; Fig. 3 a section on the line 3 3 of Fig.` 1

and on an enlarged scale;

Fig. 4 a view similar to Fig. lbutshowing only a part of the apparatus and showing the same on an enlargedscale with parts in section, and showing also a modification;

terial may be in any suitable form, or may consist of rods, bars, rolled wire, sheet metal or the like, and in Figs. lf-to 4 inclusive, the workpiece or metal to be hea-ted or operated upon is shown at a in the formof a Wire or rod, and in Figs. 6 to' 8 inclusive, in the form of a sheet a2. l l

All the forms of constructionshown involve feed rollers b which are mounted in connection with the machine in the usual 'manner and are operated inthe usual manner, and inV themselves, or independently, form no part of this invention, except as hereinafter, described. y

f The operative construction shown in Figs. 1 to 3 inclusive, with the exception of a water-cooled transformer shown in Fig. 1 and method of mounting the operative parts `is the same as that shown anddescribed in the application hereinbefore referred to, and

\ in the practice of my invention, as shown in .sa1d figures, 'I provide tWo upright yokeshaped supports c which aremounted on i suitable rods or bars c2 which form a part of the framework of the machine', but the method of mounting the supports c is immaterial, and said supports may be mounted in connection with, or formed in connection with the framework of` the machine in any desired manner.v

The supports c are adjustably mounted on the rods'cz and may be locked in any desired position of adjustment by set screws or similar devices c3 as shown in Fig. 3. `Mounted in and insulated from the supports c are shafts (l and (Z2 and other shafts d3 and d4 are mounted above the shafts d and d2 respectively, and in blocks or bearing members e vertically movable in the top portions of the supportsc, and from which said shafts da and d* are insulated,-fas clearly shown in Fig. 3. The blocks or bearing members care normally depressed by springs e: which are held in place by plates c3 secured to the top portions of the supports c.

Rotatably mounted on the shafts d, d2, (Z3 and d* respectively are roller cr disk-shaped electrodes f, f2, f3 and f4, said electrodes being/provided with sleeve portions and mounted on the sleeve portions of the electrodes f2 and f are intermeshing gears g and g2, and mounted on the sleeveotl the electrode ,"2 is a sprocket Wheel g3 around which passes a chain g4 which also passes around a sprocket g5 on the shaft of thelower ieed` roller b. -The periphery of the roller orv disk-shaped electrodes are l! -shaped in form as shown in lsaid igures, whereby the Wire or rod fed therebetween may be readily heated.

Mountedon the shafts d, d2, cl3 and cl* at usual leads 2l and 3, the lead i2 being` connected with the casing h, while the lead' 3` is connected with the casing h2, and the casings z and h3 and h2 and h4 are respectively put infelect-rical communication by means of metal strips al and 5. f

A suitable",switchl board G is provided, With which vis connected the main circuit Wires z'7 land 8, one of which connects With a switch arm 9 which is adapted to make contact with al plurality ofcontacts 10, andthe circuit Wire 7 is connected With'the transformer by means of a Wire 11 and Wires are connected with the contacts 1 and with the transformer. By means of this switch construction the degree of heat may be regulated by operating the switch arm to increase or decrease the voltage, whereby the volume of heat in yvarious kinds and classes of metal or Workpieces ma be regulated toproduce the deslred resu t.

Water circulating pipes j and jz are connected with the Contact casings its and if respectively, and otherypipes 7'3 connect the casings it and h4 with the casings it and h2 respectively, and the casings la and it are provided with discharge `pipes jl which communicate with a pipe j? which is coiled in the transformer a" and passes out therethrough as shown at j, and by means oiI the pipes j to, j6 inclusive Water may be passed through the contact casings h to at inclusive, to cool the roller electrodes, and said Water is also passed through the transformer' a to cool the same.

I also provide springs .7c which are mounted on the shafts (i to Z4 inclusive, as shawn in Figs. 2 and 3, and adapted to operate in connection with sleeve end portions of panying drawing ,and the. following statement.

As is usual in machines of the class described the 1)vire or rod as is fed step by step into the machine by means of the rollers I) and in the practice of my invention said ivire vis fed betiveen the roller electrodes f and therollers and f4 also aid in, or

serve to feed said metal when heated into the machine by reason of the connection thereof with one of the feed rollers, or the shaft thereof, and the gears g'-g2 as hereinbefore set out, and when the Wire or rod is idle or held against movement between the .roller electrodes the same is heated to the ydesired extent and then fed into the ma` chine, as will be readily understood. This heating is a continuous or continuous-intermittent operation. By reason of the adjustable mounting of the supports c, the roller electrodes or the separate pairs thereof may be adjusted toward and from each other,

whereby-the amount or length of a Wire or rod to be heated may be varied, as Will be readily understood, and the Water pipes or connections to jt inclusive, are made flexible to permlt of the adjustment of the supports c, as above specified, and the leads 2 and 3 of the transformer vi are also of such construction as to'permit of the above adj ustments.

The construction shown in Figs. l and 5 is practically the same as that shown in Figs. 1 to 8 inclusive, except that the roller electrodes f--jq are rotatably mounted in connection with the contact casings ,lt-Jr*7 and said contact casings are. pivotally mounted to the supports c as shown at )L5 in Figs. Ltand 5 of the drawings, and thisconnection is 'formed by a pin or bolt it which is insulated from the supports c as shown at it? in Fig. 5, and in the construction shown in -Figs. and 5, the contact casings fi and k are 'ncrmaliy held together by spring fr* and the Contact casings if and h4 are similarly held together by a sprirc; a9 and other springs hw are mounted beneath the. Contact casings )t and fr and serve to support the separate pairs of casings, and heid them in their desired position. and by means ot the above described mounting or' the @sings .f1-h4 with the contact rollers f--It it will be noted that the separate pair-oie reiter electrodes are movable independently of each other and each roller in each pair is movable independently of the other roller in each pair, and by means of this construction, or this mounting of the roller electrodes, said electrodes will adapt themselves to the workpiece or material fed therebetween, and to any variations in said material as will be readily understood.

The voperation of feeding the workpiece or,

material into the roller electrodes as shown in Fig. Lwill be the same as that shown in Fig. l, but ,in this construction the second pair of electrodes are not geared in connection with or driven by the feed rollers, and while I have not shown'th'e mounting of the supports c, it will be understood that the same may be mounted' as in Figs. l to 3 in-l elusive or otherwise. v

In Figs. Sand 7,1 have shown another modification in which tubular electrodes m, m2, m3 and m* are substituted for the roller electrodes f-e-f* whereby a sheet or stri of' wardly of said contact plates the pipes' n-Jn are provided with collars n.5 `having ears ne arranged as shown in Figs. 7 and 8. Mounted between or insulated from the collars nf and contact plates 0 are springs 03 which serve to 'force the contact plates o` against the ends ofthe tubular electrodes fm/ m4 to insure the contact therebetween.

Connected with the ears n on the collars' a5 are springs o4, as clearly shown in Fig. 7,

which serve to hold the tubular electrodes together, or in firm contact with the material fed therebetween as will 'he readilyunder` stood.

The tubular electrodes are arran ed in pairs as m and ma, m2 and m4, each pair having a contact plate 0 at the opposite ends thereof, and the leads i2 are connected with I the contact plates o' in one pair, while the leads z' are cpnnected with the contact plates o of the other'pair, as will be readily underi stood on a consideration of Figs. 6 and 7 of the drawings. 'l l `With this construction the sheet of metal a2 to be heated is fedv between the tubular electrodes m-m by means of the feed rollers b in the same manner as the wire or rod tl is fed between the roller electrodes fwf., and said tubular electrodes may be adjusted toward and from each otherv in the samel manner as the roller electrodes j-f4.

The construction shown in Fig. 8 of the drawing is exactly the saine as that' shown in Figs. 6 and 7 except that the periphery of the tubular electrodes is composed of. a plurality of annular yprojection portions forming corresponding annular recessed portions mf and the annular projecting portions m5 on the tubular electrodes in one pair are arranged in line' with the annular recessed portions of the tubular electrodes of the other pair, as clearly shown in Fig. 8, and while Ihave, shown certain details of `construction for' heating material prior to the working or forming of the same, my invention is not limited to the details of construction herein shown and described, and changes therein and modificationsthereof may be made, within ythe scopeJo'll tlie appended claims, without departing from the spirit of my invention or sacrificing its advantages.

As hereinbefore stated the invention de# scribed and claimed herein is adapted for ,use in connection with metal working machines of `any kind or class, and such. inachines as shown in said prior application, and it'will bel understood that the material such as a-f as shown in the accompanying drawing when heated is fed l,into 'suitable forming or fashioning'elements in the usual or any preferred manner, and as this feature forms no part of my invention the same has not been s liown or described herein.

Having fully described my invention, what l claim as new and desireto secure by Letters Patent, is

l. ln an electric heating apparatus for metal working machines, means for feeding material into the machine, means foriheating said material as it is fedV into the ma-v chine comprising two pair of rollers each of said rollers forming an electrode, means for holding said rollers into firm contact with the material ed therebetween, 'means for cooling said rollers, and means for gearing `one pair of said rollers in connection with said feeding means.

2. In an electric heating apparatus for metal working machines, a pair of main feed rollers mounted to feed material into thev machine, and electricheating devices mounted rearwardlypf said feed rollers andv by which the material is heated as it is :fed into the machine, said devicesr comprisin two pair of contact rollers, the rollers o' each pair being in an vopen electric circuit, and tensional means forbringin the rollers of each pair into firm contact with the material passed therebetween.

3. In an electric heating apparatus' for metal working machines, a pair of main feed rollers` mounted ,to feed material into the machine, and electric heating devices mounted rearwardly o'f said feed rollers and by which the material is heated as it is fed into ,the machine, said devices comprising two 130 of contact rollers, the rollers'of each pair being in an open electric circuit, tensional means for bringing the rollers of each pair into firm contact with material passed therebetween, and means for gearing one pair of said contact rollers in connection with said feed rollers.

5. In an electric heating apparatus. for metal working machines, main feed rollers mounted to feed material into the machine, and heating` devices mounted rearwardly of said feed rollers and comprising two pair of contact rollers, the rollers of each pair being in an open electric circuit, tensionalmea'ns for bringing the rollers of each pair into firm contact with material` passed therebetween, means f-or. 'caring onel pair of sid rollers in connection with 'the feed 'i and means for adiiisting the other pair of said rollers toward and from said first named pair.

5. lnv an electric heating appliratus for metal working machines, main feed rollers mounted to feed material into 'the machine, and heating devices mounted "wirwar-diy of said feed rollers and comp ing two-pair of contact rollers, the rolle each pair being :in an open electric. circuit, tensional means for bringin the rollers ci' each pair into iirni contact lili the taaie-.rial Y therebetween, means for geari said rollers in connt ."l ers, means for adir said rollers toward an pair, and means for regula of heat applied to the mat tween said rollers.

7. A hea-ting apparatus, iacinprising tifo pair of tensional rolled .U rtrodes between which material to be heated is passed, and means for adjusting the separate pairs ofl electrodes towaril and vfrom each other wherebythe amount of material passed therebetween to be heated mayY be varied.

8. A heating apparatus comprising two pair of tensionally controllefl electrodes between which material to be heated is passed, contact casings mcunted adjacent to each of said electrodes, tensional means for holding the electrodes into firm contact with said casings, the contact casings of each pair being in electrical communication, and means for circulating water through said contact casings to cool said electrodes.

9. A heating apparatus for metal working `pair of :irstwnained @he degree passed bemachines, comprising two pair of tensionally controlled electrodes, feed rollers for feeding material between the separate pairs of electrodes, contact casings mounted adjacent to each of said electrodes, tensional means for holding the electrodes into firm contact with said casings, `the contact casings of each pair being in electrical communication, means for circulating water through said contact casings to cool said electrodes, and means for adjusting the separate pairs of electrodestoward and ffrom each other, whereby the amount of material passed ltherebetween t0 be heated may be varied.

l0. A heating apparatus, comprising an electric transformer, and two pair of electrodes in electrical connection therewith and between which material to be heated passes, means for regulating the degree of heat applied. to the material passed between said electrodes, and means for water-cooling said electrodes and said transformer.

1l. ein electric heating apparatus of the class described comprising two frames adjustably `mounted on suitable supports, shafts mounted centrally and transversely of each of said frames and insulated therefrom and on which are mounted rotatable electrodes and. contact casings, corresponding shafts mounted over said first named shafts and. capable of vertical movement, rotatable electrodes and contact casings mounted on said last named shafts, and tensional means for holding the rotatable electrodes on each of said shafts into firm contact with said contact casings.

ein elecrricheating apparatus of the class described, comprising two frames ad- -iustably mounted onl suitable supports, shafts mor-t i of each ef d frames and 'insulated therefrom and on which are mounted rotatable Ds, correspondid first named eiectrcdes and contact cas ing shafts mounted over shafts and rotatable el ctrodes and contact. casings mounted on said last named shafts, tensional means for holding the rotatable electrodes on each of said shafts into firm contact with said contact casings, an electric transformer placed ink electrical connection with said contact casings. means for circulating water through said contact casings to.

` cool said rotatable electrodes, and means ed centrally and transversely capable of vertical movement,

members in `each pair together, rotatable.

electrodes mounted in connection with said conducting members, tensional means for holding said electrodes in rm contact there-y with whereby materialpassed between the electrodes of each'pair of said conducting n members may be heated, and means for cooling said electrodes.

15. A'heating apparatusof the class described, comprising a plurality of rotatable electrodes, electrical `conducting members mounted adjacent to the faces of ,said electrodes, tensional means for holding said conducting members' in firm contact with said electrodes, andmeans for holding said electrodes in contact with material passed therebetween.

16. A heating apparatus of the class described, comprising a plurality of rotatable electrodes, electrical .conducting members mounted adjaoentto the faces of said electrodes, tensional means for holding said conductin members in firm contact with said electro es, means for holding said electrodes in contact with material passed therebetween, and means for cooling said electrodes.

17. A heating apparatus of the class described, comprising a plurality of rotatable electrodes the perlphery of said electrodes being provided with a plurality of annular enlargements.

1S. A heatiing apparatusof the class described, comprising a plurality of rotatable electrodes the periphery of said electrodes being provided with a plurality of annular enlargements, a plurality of rotatable electrodes arranged in pairs the periphery of said electrodes being provided with a plumeans for water-cooling said' rollers, and

rality ofy annular enlargements forming a plurality of annular recesses, the annular t enlargements on onev pair of electrodes being in line with the annular recesses of the other pair.

19. In an electric heating apparatus for metal working machines, feeding devices mounted therein and heating devices mounted rearwardly. of said feeding devices and',

comprising two pair of contact and heating rollers betweenA whichthe material is passed,

means for regulating-the degree of heat a f plied-to the material passed between said rollers. 20. A heating apparatus for metal working machines, comprising a plurality of adj ustably mounted supports, a pair of roller electrodes mounted in connection` with each of said supports, the electrodes in each pair being independently pivoted to said supportsV and adapted to move transversely of the ,material passed therebetween, and

Vmeans whereby the electrodes in each pair said material.

21. A heating apparatus comprising a. plurality of roller electrodes between which material to be` heated is passed, supports mounted longitudinally of said material and adjustable toward and from eachother and with which said electrodes are connected whereby the amount of material passed between said electrodes to be heatedmay be varied. p

Intestimony that I claim the foregoing as my invention I have signed my name in presence of the subscribing witnesses this 4th day of April 1917. v

FRANK P. KOBERT.

may be collectively moved transversely of Witnesses:

C. E. MULREANY, H. E. VTHOMPSON. 

